#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main()
{
	int a = 0;
	int b = 0;
	int k = 0;
	scanf("%d %d %d", &a, &b, &k);
	int c = k * b;
	if (a >= c)
	{
		printf("good");
	}
	else
	{
		printf("bad");
	}
	return 0;
}